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Lack of Exercise‐Induced Hypoalgesia to Repetitive Back Movement in People with Chronic Low Back Pain.

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Title: Lack of Exercise‐Induced Hypoalgesia to Repetitive Back Movement in People with Chronic Low Back Pain.
Authors: Kuithan, Pauline, Heneghan, Nicola R., Rushton, Alison, Sanderson, Andy, Falla, Deborah
Source: Pain Practice. Sep2019, Vol. 19 Issue 7, p740-750. 11p. 2 Color Photographs, 1 Diagram, 2 Charts, 2 Graphs.
Subjects: Chronic pain, Exercise, Lifting & carrying (Human mechanics), Lumbar vertebrae, Scientific observation, Task performance, Cross-sectional method, Descriptive statistics, Pain threshold, Lumbar pain
Abstract: Purpose: To investigate whether people with chronic low back pain (LBP) show dysfunctional exercise‐induced hypoalgesia (EIH) in response to repeated contractions of their back muscles during a lifting task. Methods: In this cross‐sectional observational study conducted on asymptomatic participants (n = 18) and participants with chronic LBP (n = 21), quantitative sensory testing (QST) was applied extensively over the lumbar region and a remote area before and after a repeated task that involved lifting a 5‐kg box for ~7 minutes. QST included pressure pain thresholds (PPTs), thermal detection, pain thresholds, and measures of temporal summation. Topographical maps of the percentage change in PPT detected at 16 locations over the lumbar region were generated to explore regional differences and compared between groups. Results: Mean (standard deviation) PPTs measured from 16 sites over the lower back changed significantly in asymptomatic participants (+29.78 kPa [41.4]) following task completion, indicative of EIH, whereas no significant change was observed for the low back pain (LBP) group (−14.87 kPa [61.2]). No changes were detected at the remote site for either group. No changes were revealed for the thermal tests. Temporal summation data revealed decreasing pain sensitivity as the test progressed, but the test response did not change after the exercise for either group. Conclusion(s): Unlike asymptomatic individuals, participants with LBP lacked EIH over the lumbar erector spinae muscles following repeated lifting. Although these results should be considered in relation to the study limitations, particularly the absence of a control group, the findings support impaired EIH in patients with LBP. [ABSTRACT FROM AUTHOR]
Copyright of Pain Practice is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Lack of Exercise‐Induced Hypoalgesia to Repetitive Back Movement in People with Chronic Low Back Pain.
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  Data: <searchLink fieldCode="AR" term="%22Kuithan%2C+Pauline%22">Kuithan, Pauline</searchLink><br /><searchLink fieldCode="AR" term="%22Heneghan%2C+Nicola+R%2E%22">Heneghan, Nicola R.</searchLink><br /><searchLink fieldCode="AR" term="%22Rushton%2C+Alison%22">Rushton, Alison</searchLink><br /><searchLink fieldCode="AR" term="%22Sanderson%2C+Andy%22">Sanderson, Andy</searchLink><br /><searchLink fieldCode="AR" term="%22Falla%2C+Deborah%22">Falla, Deborah</searchLink>
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  Data: <searchLink fieldCode="JN" term="%22Pain+Practice%22">Pain Practice</searchLink>. Sep2019, Vol. 19 Issue 7, p740-750. 11p. 2 Color Photographs, 1 Diagram, 2 Charts, 2 Graphs.
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  Data: <searchLink fieldCode="DE" term="%22Chronic+pain%22">Chronic pain</searchLink><br /><searchLink fieldCode="DE" term="%22Exercise%22">Exercise</searchLink><br /><searchLink fieldCode="DE" term="%22Lifting+%26+carrying+%28Human+mechanics%29%22">Lifting & carrying (Human mechanics)</searchLink><br /><searchLink fieldCode="DE" term="%22Lumbar+vertebrae%22">Lumbar vertebrae</searchLink><br /><searchLink fieldCode="DE" term="%22Scientific+observation%22">Scientific observation</searchLink><br /><searchLink fieldCode="DE" term="%22Task+performance%22">Task performance</searchLink><br /><searchLink fieldCode="DE" term="%22Cross-sectional+method%22">Cross-sectional method</searchLink><br /><searchLink fieldCode="DE" term="%22Descriptive+statistics%22">Descriptive statistics</searchLink><br /><searchLink fieldCode="DE" term="%22Pain+threshold%22">Pain threshold</searchLink><br /><searchLink fieldCode="DE" term="%22Lumbar+pain%22">Lumbar pain</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Purpose: To investigate whether people with chronic low back pain (LBP) show dysfunctional exercise‐induced hypoalgesia (EIH) in response to repeated contractions of their back muscles during a lifting task. Methods: In this cross‐sectional observational study conducted on asymptomatic participants (n = 18) and participants with chronic LBP (n = 21), quantitative sensory testing (QST) was applied extensively over the lumbar region and a remote area before and after a repeated task that involved lifting a 5‐kg box for ~7 minutes. QST included pressure pain thresholds (PPTs), thermal detection, pain thresholds, and measures of temporal summation. Topographical maps of the percentage change in PPT detected at 16 locations over the lumbar region were generated to explore regional differences and compared between groups. Results: Mean (standard deviation) PPTs measured from 16 sites over the lower back changed significantly in asymptomatic participants (+29.78 kPa [41.4]) following task completion, indicative of EIH, whereas no significant change was observed for the low back pain (LBP) group (−14.87 kPa [61.2]). No changes were detected at the remote site for either group. No changes were revealed for the thermal tests. Temporal summation data revealed decreasing pain sensitivity as the test progressed, but the test response did not change after the exercise for either group. Conclusion(s): Unlike asymptomatic individuals, participants with LBP lacked EIH over the lumbar erector spinae muscles following repeated lifting. Although these results should be considered in relation to the study limitations, particularly the absence of a control group, the findings support impaired EIH in patients with LBP. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Pain Practice is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1111/papr.12804
    Languages:
      – Code: eng
        Text: English
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        PageCount: 11
        StartPage: 740
    Subjects:
      – SubjectFull: Chronic pain
        Type: general
      – SubjectFull: Exercise
        Type: general
      – SubjectFull: Lifting & carrying (Human mechanics)
        Type: general
      – SubjectFull: Lumbar vertebrae
        Type: general
      – SubjectFull: Scientific observation
        Type: general
      – SubjectFull: Task performance
        Type: general
      – SubjectFull: Cross-sectional method
        Type: general
      – SubjectFull: Descriptive statistics
        Type: general
      – SubjectFull: Pain threshold
        Type: general
      – SubjectFull: Lumbar pain
        Type: general
    Titles:
      – TitleFull: Lack of Exercise‐Induced Hypoalgesia to Repetitive Back Movement in People with Chronic Low Back Pain.
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            NameFull: Kuithan, Pauline
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            NameFull: Heneghan, Nicola R.
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            NameFull: Rushton, Alison
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            – D: 01
              M: 09
              Text: Sep2019
              Type: published
              Y: 2019
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              Value: 19
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